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Joint International Conference on Long-term Experiments ...

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Table no. 7 The calculati<strong>on</strong> of the medium diameter, dispersi<strong>on</strong> and distributi<strong>on</strong> form<br />

indicators , case 3<br />

Calculated characteristics Before break After break<br />

Medium Diameter(cm) 22,04188482 23,173913<br />

Variance 67,44612783 65,020477<br />

Standard deviati<strong>on</strong> 8,212559152 8,0635276<br />

Variati<strong>on</strong> factor 0,372588788 0,3479571<br />

Asimetry -0,142394868 -0,2028422<br />

Excess 1,89798843 2,0031626<br />

Table no. 8 Species proporti<strong>on</strong> case 3<br />

Basic area proporti<strong>on</strong> Volume proporti<strong>on</strong> Tree number<br />

Species<br />

Before After Before After<br />

proporti<strong>on</strong><br />

Before After<br />

break break break break break break<br />

FA 33,60 34,62 35,32 35,73 27,96 36,23<br />

GO 42,29 47,54 43,74 48,55 26,88 34,78<br />

CA 20,51 13,51 17,37 11,49 43,01 26,09<br />

ST 3,60 4,33 3,56 4,23 2,15 2,90<br />

CE 0,00 0,00 0,00 0,00 0,00 0,00<br />

CI 9,95 0,00 8,30 0,00 2,69 0,00<br />

Table no. 9 The calculati<strong>on</strong> of the break intensity and of Hart-Becking index case 3<br />

Calculated characteristics Values<br />

Tree number intensity 25,80645161<br />

Basic area intensity 16,79057756<br />

Volume intensity 15,80365993<br />

Spacing factor ( Hart-Becking index)<br />

Before break<br />

14,273994<br />

After break<br />

16,571523<br />

The last case describes a str<strong>on</strong>g thinning(5), which is recommendable in the actual<br />

situati<strong>on</strong>, because of the fact that an intensity, that is too big, could destablize the<br />

internal structure of the stand.<br />

This pattern for the simulati<strong>on</strong> and evaluati<strong>on</strong> of the break puts at the user’s disposal<br />

also the comparis<strong>on</strong> of experimental distributi<strong>on</strong>s with those recommended as normal<br />

by the speciality works(1,2). In c<strong>on</strong>tinuati<strong>on</strong>, the distributi<strong>on</strong> formulas of the tree<br />

number with regards to quality grades, for the above examples, are presented:<br />

- Experimental distributi<strong>on</strong> after Beta<br />

, 3<br />

0446 , 1 2<br />

0, 01592 × 10 x − 7 57 − x<br />

y = ( ) ( ) 7517<br />

- distributi<strong>on</strong> after break case 1<br />

0153 , 2 2<br />

436, 064 × 10 x − 7 57 − x<br />

y = ( ) ( ) 9197 , 3<br />

506

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